Hydrocarbon-motor.



M. TIBBETTS.

HYDROCARBON MOTOR.

APPLICATION FILED JULY 18. 1912.

Patented June 1, 1915.

WITNESSES INVENTOR) llWlTEM @TATEd PAT 1;

-11; oniaicn.

MILTON TIIBIBETTS, 0F DETROIT, MICHIGAN, AS SIGNOR TO PACKARD MOTOR CARSpecification of Letters Patent.

COMPANY, OF DETROIT, MICHIGAN, A o'onronnrxon or MICHIGAN.

HYDBOCARBON-MOTOR.

Patented June 1, 1015.

Application filed July 18, 1912. Serial No. 710,310.

To all whom it may concern:

Be it known that I, MILTON TIBBETTs, a citizen of the United States, andresident of Detroit, Wayne county, State of Michigan,

5 have invented certain new and useful Improvements in HydrocarbonMotors, of which the following is a specification.

This invention relates to hydrocarbon motors and particularly to motorsof this type using rotary valves. In motors of this type for use onmotor vehicles or motor boats various devices are provided for relievingthe cylinder pressure during the compression stroke of the motor for thepurpose-of making cranking easier. In a four-stroke cycle motor it isdesirable that the cylinder be open to the atmosphere to relieve thepressure during a part only of the compression stroke. and during theremainder of this 20 *stroke the cylinder should be closed.

'construct a motor of the above referred to itype that the compressionof each cylinder may be relieved at the proper time in its cycle. andthe mechanism for doing so may be of simple construction and easilycontrolled by the operator.

The invention may be said to be an improvement over the motor shown inpatent to Russell Hufi No. 1,006,095 dated Oct. 17, 1911, the presentstructure dispensimg with the necessity for moving the rotary valveendwise in order to bring the relief ports into operation. I x

Another object of the invention is to so mount the motor on a motorvehicle and to make such connections that the relief valves may beoperated either from the operators seat or from a position in front ofthe 40 vehicle. Y

Other objects of the invention will .be apparent from the followingdescription. taken in connection'with the drawings, in which,

Figure 1 is a side elevation of a vehicle motor embodying my invention;Fig. 2 is a vertical section through the motor; Fig. 3 is a detail viewof a portion of one of the rotary-valves; and Fig. 4 is a detail view ofanother form of valve.

Referring to the drawings, the motor is shown as applied to a motorvehicle and in Fig. 1 the motor is represented at 10 supported on thecross bars 11 of the motor vehicle frame between the dash 12 and theradiator 13. In the sectional View the crank shaft 14 may be seentogether with the connecting rod 15 and piston 16 which reciprocates inthe cylinder 17, of which cylinders there are four as shown particularlyin Fig. 1. The cylinders 17 are shown as water jacketed at 18, and thereare shown two longitudinal bores 19in which are arranged the rotaryinlet valve 20 and the rotary exhaust valve 21. It will be understoodthat these valves are driven from the crank shaft by any suitable meansand preferably at a ratio of one revolution of the valves to fourrevolutions of the crank shaft.

The valves are formed with suitable main ports 22 which are shown asthrough ports wherebv they are caused to open the cylinder ports 23twice during each revolution. So far as the operation of these mainports is concerned the action is the same as that of v ment of theexhaust valve is eliminated.

In addition to the main ports 92 in the exhaust valve 21 there are twoauxiliary ports 24 which extend diagonally through the valve. Each ofthese ports 24 has one of its ends in a transverse plane with theadjacent main port 22 so that this end of said port 2- registers at eachrevolution of the valve with the port 23 of the cylinder and it is sodisposed relative to said main port 22 e that it will register with saidcylinder port 28 during a part of the compression stroke of the piston.While one end of each of said ports 2t is registering with the cylinderort 23, its other end. indicated at 25 in Fig. 3 1s registering with anauxrharv port 26 formed in the cylinder wall as shown parmotor and havea handle 30 connected at one of its ends on the operators side of thedash 12, and a knob 31 at its forward end so that it may be operatedfrom the front of the 7 vehicle when the operator is about to crank themotor. v

, It will be understood that when the valve 27 is closed the port 26 iscut off from the atmosphere and the ports 24 are thereby inoperative.This is'the normal position of the valveas the relief ports are ofcourse intended to be brought into operation only when it is desired torelieve the compression in the cylinders, as when cranking.

It will be further understood that the ports 2i do not intersect eachother in the valve 21'but are independent ports as shown in dotted linesin Fig. 2. There are two of these ports for each cylinder where thevalve rotates at one to four in a four-cycle motor, but of course onlyone port 24 would be necessar ylif the valvewere rotated at two to one.

' In Fig. ,4, a slightly modified form of auxiliary port is shown. Inthis case, instead of drilling the ports 24 diagonally, the ports are"drilled straight through at points adjacent the main ports 22 andbranches orbypasses 24 are milled in the valve so that one end of eachof the ports 24 will communicats with the cylinder port 23 at eachrevolution of the valve.

Having thus described my invention what I claim and desire to secure byLetters Patent is:

I 1. In a hydrocarbon motor, the combination witli the cylinder and arotary valve, means in said valve independent of the main valve port forrelieving the cylinder pressure during a part of the compression strokeof the motor, and means operative manually independently of the valvefor controlling the action of said first means. 2. In a hydrocarbonmotor, the combination with the cylinder and a rotary valve, of

meansoperative with the valve in its normal operative position forrelieving the cylinder pressure during a part of the compression stroke.

3, In a hydrocarbon motor, the combinapressure during a part of thecompression {5 stroke, and a valve for manually controlling theoperation of said means.

5. In a hydrocarbon motor, the combination with the cylinder having a'port and a rotary exhaust valve, said valve having a main exhaust portand an auxiliary exhaust p'ort,both of which ports are constantly in aregistering plane with the cylinder port, of means for normallymaintaining said auxiliary port inoperative and for bringing saidauxiliary port into operation.

6. In a hydrocarbon motor, the combination with the cylinder having aport, and a rotary exhaust valve, said valve having a main exhaust portand an auxiliary exhaust port, both of said exhaust ports beingconstantly in a registering plane with the cylinder port, of meansoutside the valve for controlling the operation of said auxiliary port.7. In a hydrocarbon motor, the combination with the cylinder havingintake and exhaust ports, and a valve mechanism controlling said portsincluding a rotary valve having a main port adapted to register withsaid 1 exhaust port, and having an auxiliary port; adapted to registerwith said exhaust porti and with an auxiliary port in the cylinder,, andmeans for manually controlling said cylinder auxiliary port. I

8. In a multi-cylinder hydrocarbon motor, the combination with thecylinders having inlet and exhaust ports, of a rotary valve for theinlet ports and a rotary valve for the exhaust ports, one of said rotaryvalves having a relief port for each cylinder adapted to be brought intooperative relation with the cylinder exhaust ports when the pistons areon their respective compres-. sion strokes,'and means operative with thelatter said valve in its normal operative position for manuallycontrolling the operation of said relief ports.

9. In a multi-cylinder hydrocarbon motor, the combination with thecylinders having inlet and exhaust ports, of a rotary valve for theinlet ports and a rotary valve for the exhaust" ports, said rotaryexhaust valve having a relief port for each cylinder adapted to bebrought into operative relation with the cylinder exhaust ports when thepistons are on their respective compression strokes,

and means including valves mounted on the cylinders for controlling theoperation of said relief ports. i

10.- In a multi-cylinder hydrocarbon motor, the combination with thecylinders and a rotary valve extending lengthwise of the motor, reliefports in said valve, valves on said cylinders controlling the operationof said relief ports, interconnecting means be tween said valves, andmeans at either end 10 of said motor for operating all of said valves.

In testimony whereof I aifix my signature in the presence of twoWitnesses.

MILTON TIBBETTS. Witnesses:

LE R01 I. WILLIAMS, J. C. RINK.

